Direct-write, focused ion beam-deposited,7 K superconducting C-Ga-O nanowire

Details Direct-write, focused ion beam-deposited,7 K superconducting C-Ga-O nanowire Direct-write, focused ion beam-deposited,7 K superconducting C-Ga-O nanowire

2010-06-10

arxiv.org/abs/1006.2173v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Accepted for APL

Scientific paper

We have fabricated C-Ga-O nanowires by gallium focused ion beam-induced deposition from the carbon-based precursor phenanthrene. The electrical conductivity of the nanowires is weakly temperature dependent below 300 K, and indicates a transition to a superconducting state below Tc = 7 K. We have measured the temperature dependence of the upper critical field Hc2(T), and estimate a zero temperature critical field of 8.8 T. The Tc of this material is approximately 40% higher than that of any other direct write nanowire, such as those based on C-W-Ga, expanding the possibility of fabricating direct-write nanostructures that superconduct above liquid helium temperatures

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